Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad1276eb6fdbf0537c5845295b7f09c35b169f01ec9d368b0af23cf22c8d7188' 
  AND token = 'wfvbjPfNC09sbal6m4AbwjWyCTaewS6PVW1zlqkTddQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}